The narrative about the work of military counterintelligence officers is based on memories and archival documents. The author is grateful to Major Generals K. F. Firsanov and A. E. Danko, Colonels P. A. Zaitsev and V. V. Kochetkov, Major V. Ya. Zhukanin, Senior Lieutenant A. E. Pavlov, who during the Great Patriotic War wars and in subsequent periods of the history of our state protected its security, as well as former residents of the city of Harbin N. L. Trufanova and M. K. Shchurenko. The author is grateful to the writers S. M. Tabachnikov, V. N. Myasnikov, I. A. Maksimov for their advice and wishes after reading the manuscript “On the Hills of Manchuria.” The events described took place in Transbaikalia, Manchuria, in the area of Ulan-Ude and Chita at the end of 1944 - spring of 1945.